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In this paper· we demonstrate a Yb-doped· all-polarization-maintained· dumbbell-shaped fiber laser operating in dissipative soliton resonance regime. A nonreciprocal phase shifter is introduced to a reflective nonlinear optical loop mirror to reduce the self-starting threshold. The duration of the square pulses generated can be adjusted from 207ps to 20.6 ns by increasing pump power. Up to 512 nJ...
We report a high-power, high-efficiency Tm, Ho:YAlO3 (Tm, Ho:YAP) laser pumped by two laser diodes. The Tm (5 at.%) and Ho (0.5 at.%):YAP crystal is cut along the a axes, and the resultingcrystals are measured 4 × 4 × 8 mm3. The laser crystal is double end-pumped by two 18.0-W fiber-coupled laser diodes at 793.6 nm, and the output power of the Tm, Ho:YAP laser is 13.8W in continuous wave (CW) mode...
We report on the demonstration of a 418 W high power random fiber laser, which is the highest power to the best of our knowledge. The random laser is a half-open cavity based on 130 meters long passive fiber with core diameter of 20 μm. It is pumped by 1070 nm Yb-doped fiber laser. The central wavelength of 1st order random laser is 1120 nm. The output power, spectral, and temporal characters are...
We have demonstrated a passively Q-switched Erbium-doped fiber laser using PbS quantum dots polystyrene film (QDPF) as saturable absorbers (SAs). Compared with other SA materials, PbS QDPFs have advantages of broad absorption range, high quantum yield, and facile preparation. We have successfully generated stable Q-switched pulse with a repetition rate of 20.98 kHz. To our knowledge, this is the first...
Recent progress in development of broadly tunable Cr:ZnSe lasers for trace gas detection is reported. With an intracavity CaF2 prism, the CW Cr:ZnSe laser was tuned within a total wavelength range of 427 nm from 2164 nm to 2591 nm. And, the applied research about trace gas sensing based on Mid-IR broadly tunable Cr:ZnSe lasers has been discussed in this paper, which indicated that a single-frequency...
We demonstrate that a low repetition rate, all-fiber passively mode-locked Yb-doped fiber laser through nonlinear polarization rotation (NPR). A 1000 m long single-mode fiber (SMF) is inserted into the cavity to lower the repetition rate. The laser operates in dissipative soliton resonance (DSR) region and generates stable square pulses with a 202.3 kHz fundamental repetition rate. When the pump power...
We propose and experimentally investigate a linearly-polarized narrow linewidth random fiber laser (RFL) operating at 1080 nm and boost the output power to kilowatt-level with near-diffraction-limited beam quality by a master-oscillation-power-amplifier (MOPA) configuration. The RFL based on half-opened cavity generates 0.71 W seed laser with 88 pm full width at half-maximum (FWHM) linewidth and 22...
A 1.5 μΜ tunable CW single-frequency seed laser is injected into the methane-filled negative curvature hollow-core fiber, and then amplified by stimulated Raman scattering of methane molecule. The Stokes linewidth is measured at the output using a scanning Fabry-Perot interferometer. When the wavelength of the seed laser is tuned to the Stokes transition and the polarization direction of the seed...
An all-fiber supercontinuum (SC) source with a repetition rate of over 100 MHz is experimentally demonstrated for the first time. The SC is generated by introducing the pulse output from a normal dispersion fiber laser into high nonlinearity fibers (HNLFs). An erbium-doped fiber amplifier (EDFA) and single segment single mode fiber (SMF) are used to compress the pulsewidth to increase pulse peak power...
A multi-wavelength random distributed feedback fiber laser consisting of a length of erbium-doped fiber, a 20-km-long single-mode fiber and a Sagnac loop mirror was demonstrated experimentally. Under the pump power was changed from 30 to 180 mW, variable channel number of 2 to 8 was achieved, meaning that wavelength competition caused by homogenous gain broadening in erbium-doped fiber was significantly...
Compact visible pulsed fiber lasers possess various applications. However, fiber-compatible visible-wavelength saturable absorber (SA) is very scare. Recently, transition-metal dichalcogenides (TMDs) have attracted widespread attention due to their visible saturable absorption properties. Here, we report our recent advances in compact visible trivalent praseodymium (Pr3+)-doped ZBLAN fiber lasers...
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